Grapevine plant named &#39;Sugrafiftyone&#39;

ABSTRACT

A new and distinct grapevine variety ‘Sugrafiftyone’ is characterized by early harvest date, the production of a large-sized, green, obtuse-ovoid berry and a large bunch size. The berries of ‘Sugrafiftyone’ are very firm.

Latin name of the genus and species claimed: Vitis vinifera.

Variety denomination: ‘SUGRAFIFTYONE’.

BACKGROUND AND SUMMARY OF THE INVENTION

This application relates to the discovery and asexual propagation of a new and distinct variety of grapevine, ‘Sugrafiftyone’, as herein described and illustrated. The new variety was first selected as breeder number ‘GR366W’ by Terry A. Bacon in Wasco, Kern County, Calif. in July 2013. The variety was originated by controlled hybridization.

The new variety ‘Sugrafiftyone’ is characterized by early harvest date, the production of a large-sized, green, obtuse-ovoid berry and a large bunch size. The berries of ‘Sugrafiftyone’ are very firm.

The seed parent is the varietal selection ‘Sugrafortytwo’ (U.S. Plant Pat. No. 24,250) and the pollen parent is ‘06100-049-397’ (unpatented). The parent varieties were first crossed in May 2010. The date of first sowing was March 2011, and the date of first flowering was May 2012,

The new variety ‘Sugrafiftyone’ was first asexually propagated in December 2013 in Wasco, Kern County, Calif., by Terry A. Bacon using hardwood cuttings.

The new variety ‘Sugrafiftyone’ differs from its seed parent ‘Sugrafortytwo’ (U.S. Plant Pat. No. 24,250) in that harvest of grapes of the new variety ‘Sugrafiftyone’ starts about 12 days earlier at about July 14th compared to about July 24th for ‘Sugrafortytwo’. The new variety ‘Sugrafiftyone’ also differs from its seed parent ‘Sugrafortytwo’ in that the new variety ‘Sugrafiftyone’ has a larger berry at about 8.5 g while ‘Sugrafortytwo’ has a smaller berry at about 6.7 g. The new variety ‘Sugrafiftyone’ is similar to its seed parent ‘Sugrafortytwo’ in that both have a green berry.

The new variety ‘Sugrafiftyone’ differs from its pollen parent ‘06100-049-397’ (unpatented) in that ripening of grapes of the new variety ‘Sugrafiftyone’ starts about 2 months earlier at about July 14th compared to about September 15 for ‘06100-049-397’. The new variety ‘Sugrafiftyone’ also differs from its pollen parent ‘06100-049-397’in that the new variety ‘Sugrafiftyone’ has a larger berry at about 8.5 g while ‘06100-049-397’ has a smaller berry at about 6 g. The new variety ‘Sugrafiftyone’ is similar to its pollen parent ‘06100-049-397’ in that both have a green berry.

The new variety ‘Sugrafiftyone’ has similar berry color and harvest starts at about the same time as ‘Sugraone’ (U.S. Plant Pat. No. 3,106), but the new variety cluster size is larger at about 800 g compared to about 625 g for ‘Sugraone’, and the new variety berry size is larger at about 8.5 g compared to about 7.5 g for ‘Sugraone’. The berry color of the new variety ‘Sugrafiftyone’ is similar to ‘Thompson Seedless’ (unpatented) but the new variety berry shape is obtuse-ovoid, compared to elongated for ‘Thompson Seedless’. The new variety ‘Sugrafiftyone’ has a green berry color, compared to a red berry color for ‘Scarlet Royal’ (U.S. Plant Pat. No. 16,229) and a black berry for ‘Sugrathirteen’ (U.S. Plant Pat. No. 10,434). Harvest of the new variety ‘Sugrafiftyone’ starts earlier than ‘Scarlet Royal’ and ‘Sugrathirteen’ and the new variety has a larger cluster and berry weight.

The new ‘Sugrafiftyone’ variety has been shown to maintain its distinguishing characteristics through successive asexual propagations by, for example, cuttings, and grafting.

Variations of the usual magnitude from the characteristics described herein may occur with changes in any of a variety of factors such as growing conditions, irrigation, fertilization, pruning, management and climatic variation.

BRIEF DESCRIPTION OF THE DRAWING

The accompanying color photographic illustration shows typical specimens of the foliage and fruit of the present new grape variety ‘Sugrafiftyone’. The illustration shows the upper and lower surfaces of the leaves and exterior and sectional views of the fruit. The photographic illustration was taken shortly after the fruit was picked and the colors are as nearly true as is reasonably possible in a color representation of this type.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Throughout this specification, color names beginning with a small letter signify that the name of that color, as used in common speech, is aptly descriptive. Color names beginning with a capital letter designate values based upon the R.H.S. Colour Chart, published by The Royal Horticultural Society, London, England, 1986.

Many of the descriptive values in this specification are based on and conform to those set forth by the International Board for Plant Genetic Resources Institute Grape Descriptors (Vitis spp.) of 1983 and/or 1997, which was developed in collaboration with the Office International de la Vigne et du Vin (OIV) and the International Union for the Protection of New Varieties of Plants (UPOV).

The descriptive matter which follows pertains to three year old ‘Sugrafiftyone’ plants grown in the vicinity of Wasco, Kern County, Calif. during 2016, and is believed to apply to plants of the variety grown under similar conditions of soil and climate elsewhere.

-   Vine:     -   -   General.—(Measurements taken on a three year old plant).             Vine Size: Large. Height: Approximately 2.0 m. Width:             Approximately 2.5 m. Vigor: Vigorous. Density of foliage:             Dense. Productivity: Very productive. Crop load:             Approximately 30 kg per vine after thinning. Own root: Yes.             Training method: Typically spur pruned leaving 2 bud spurs.             Resistance: Neither resistance nor susceptibility to             diseases or pests has been observed in this variety.         -   Trunk.—Shape: Stocky. Diameter: Approximately 7.5 cm (at 30             cm above the soil line). Straps: Short. Surface texture:             Medium shaggy. Inner and Outer bark color: Inner bark about             Medium Greyed-Orange 173C and Medium Greyed-Green 188B in             outer bark. -   Shoots:     -   -   Young shoot.—Form of tip: Slightly open. Intensity of             anthocyanin coloration of tip: Absent or very weak. Density             of prostrate hairs on tip: Medium. Density of erect hairs on             tip: Absent or very sparse. Color: About Medium Yellow-Green             146D.         -   Woody shoot (Observations made in the middle third of the             shoot).—Attitude before tying: Semi-drooping to drooping.             Growth of axillary shoots: Medium strong, approximately 170             mm to 300 mm. Internode length: Medium, Approximately 65 mm.             Width at node: Approximately 15 mm. Cross section: Circular.             Surface texture: Striated. Main Color: About Medium             Greyed-Orange 166B. Color of dorsal side of internode: About             Medium Greyed-Orange 166B. Color of ventral side of             internode: About Medium Greyed-Orange 166B. Color of dorsal             side of node: About Medium Yellow-Green 146C with Medium             Greyed-Orange 166B. Color of ventral side of node: About             Medium Yellow-Green 146C with Medium Greyed-Orange 166B.             Density of erect hairs on nodes: Absent or Very Sparse.             Density of erect hairs on internodes: Absent or Very Sparse.             Density of prostrate hairs on internodes: Absent or Very             Sparse. Density of prostrate hairs on nodes: Absent or Very             Sparse.         -   Tendrils.—Distribution on the shoot at full flowering:             Discontinuous. Thickness: Approximately 4 mm. Color: About             Light Yellow-Green 148D in mid-summer. Form: Bifurcated.             Number of consecutive tendrils: Up to 2. Length of tendril:             Medium, approximately 16.5 cm. -   Leaves:     -   -   Young leaves.—Color of upper surface of first 4 distal             unfolded leaves: About Medium Yellow-Green 144B. Average             intensity of anthocyanin coloration of six distal leaves             prior to flowering: Absent. Density of prostrate hairs             between veins at lower surface of 4th distal unfolded leaf:             Absent or very sparse. Density of erect hairs between veins             at lower surface of 4th distal unfolded leaf: Absent or very             sparse. Density of prostrate hairs on veins at lower surface             of 4th distal unfolded leaf: Absent or very sparse. Density             of erect hairs on veins at lower surface of 4th distal             unfolded leaf: Absent or very sparse.         -   Mature leaves (Observations made in the middle third of the             shoot).—Average length: Large, approximately 13 cm. Average             width: Large, approximately 13 cm. Shape of blade:             Pentagonal. Number of lobes: Approximately 5. Mature leaf             profile: Undulate. Blistering surface of blade upper             surface: Absent or very weak. Leaf blade tip: In the plane             of the leaf. Undulation of margin: Slight. Thickness:             Average — typical of Vitis vinifera species. Overall shape             of teeth: Mixture of both sides straight and both sides             convex. Length of teeth: Medium, ranging from about 5 mm to             12 mm. Ratio length/width of teeth: Very small. General             shape of petiole sinus lobes: Wide open. Tooth at petiole             sinus: Absent. Petiole sinus limited by veins: Absent. Shape             of upper lateral sinus lobes: Closed to slightly             overlapping. Depth of upper lateral sinuses: Medium,             approximately 40 mm to 50 mm. Density of prostrate hairs             between veins on lower surface of blade: Absent to very             sparse. Density of erect hairs between veins on lower             surface of blade: Absent to very sparse. Density of             prostrate hairs on main veins on lower surface of blade:             Absent to very sparse. Density of erect hairs on main veins             on lower surface of blade: Absent to very sparse. Density of             prostrate hairs on main veins on upper surface of blade:             Absent to very sparse. Autumn coloration of leaves: Mostly             about Light Yellow-Green 154C.         -   Upper leaf surface.—Color: About Medium Green 137C. Surface             texture: Smooth. Surface appearance: Dull. Anthocyanin             coloration of main veins: Absent or very sparse.         -   Lower leaf surface.—Color: About Medium Green 138B. Surface             texture: Smooth. Surface appearance: Dull. Anthocyanin             coloration of main veins: Absent or very sparse.         -   Petiole.—Length of petiole: Medium, approximately 8 cm to 10             cm, mainly 9 cm. Diameter: Approximately 3 mm. Length of             petiole compared to middle vein: Slightly shorter, 9 cm for             the petiole compared to 13 cm for middle vein. Density of             prostrate hairs on petiole: Absent. Density of erect hairs             on petiole: Absent. Color: About Medium Green 138B becoming             Medium Greyed-Red 179B as it ages.         -   Buds.—Shape: Conical. Size: Medium, approximately 3 mm             wide×4 mm long. Position: Slightly held out. Bud             fruitfulness: Basal, mostly fruitful 3^(rd) to 5^(th) bud             position. Time of bud burst: Medium for area of Wasco,             Calif. Approximately March 10th. -   Flowers:     -   -   General.—Flower type: Fully developed stamen and fully             developed gynoecium. Position of first flowering node:             Usually 3^(rd) to 5^(th) node of current season growth.             Number of inflorescences per shoot: Approximately 1 to 2             with an average of about 1.5. Time of full bloom: Early for             area of Wasco, Calif. Approximately beginning July 14^(th),             with mid-ripe about July 19^(th). -   Fruit:     -   -   General.—Ripening period: Early, beginning about July             14^(th) with mid-ripe about July 19. Use: Fresh market.             Storage quality: Excellent, at least 6 weeks.         -   Cluster.—Form: Conical, shouldered. Cluster size (peduncle             excluded): Large. Cluster length (peduncle excluded):             Approximately 21 cm. Cluster width: Approximately 15 cm.             Cluster weight: Approximately 800 g. Cluster density:             Medium, loose and full. Number of berries: Approximately             100-120.         -   Peduncle.—Length: Medium, approximately 2.2 cm. Diameter:             Approximately 6 mm. Lignification of peduncle: Weak. Color:             About Light Green 138C.         -   Berry.—Size: Very large, natural size averages 8.5 g.             Dimensions: Longitudinal axis: Approximately 33 mm.             Horizontal axis: Approximately 24 mm. Uniformity of size:             Uniform. Shape: Obtuse-ovoid. Cross section: Circular. Skin             color (without bloom): About Light Yellow-Green 147D. Flesh             color: About Light Yellow-Green 147D. Anthocyanin color of             flesh: Absent. Bloom (cuticular wax): Medium, typical for             most commercial table grapes. Pedicel length: Medium,             Approximately 1.7 mm. Pedicel thickness: Approximately 7 mm.             Berry separation from pedicel: Moderately easy. Seed traces:             Berries contain 1 to 3 rudimentary soft seed traces per             berry. Seed traces are about Medium Greyed-White 156B. Berry             firmness: Very firm. Flesh Juiciness: Juicy. Flesh texture:             Crisp. Particular flavor: Slightly muscat when mature.             Refractometer test: About 18 Brix. Juice pH: About 3.6. .             Titratable acidity: About 0.49%. Brix:Acid Ratio:             Approximately 38.8.         -   Skin.—Skin thickness: Medium, about 175 μm. Skin texture:             Smooth. Skin reticulation: Absent. Skin tenacity: Tenacious             to flesh. Skin tendency to crack: Low. Skin sensitivity to             sunburn: None or very low. 

What is claimed is:
 1. A new and distinct variety of grapevine as herein illustrated and described. 